(57) A method and apparatus for carrying out a bobbin changing operation whereby full
bobbins (FB) or empty bobbins (EB) are displaced by a bobbin carrying unit in a suspended
condition between the respective bobbin wheels and a peg bar (18) for full bobbins
(FB) or a peg bar (19) for empty bobbins (EB) positioned at the lower common transfer
position, where the full bobbins can be transferred from the bobbin carrying unit
to the peg bar (18) for full bobbins, or the empty bobbins can be transferred from
the peg bar (19) for empty bobbins to the bobbin carrying unit, respectively, while
full bobbins are displaced while mounted on the peg bar (18) for full bobbins between
the above mentioned lower common transfer position and the upper common transfer position
where the full bobbins can be transferred to the corresponding respective bobbin supporting
members (116) positioned above the roving frame before starting the bobbin changing
operation, or empty bobbins are displaced while mounted on the peg bar for empty bobbins
from the upper common transfer position where the empty bobbins can be transferred
from the bobbin supporting members (116) to the peg bar (19) for empty bobbins, before
that the peg bar (18) for full bobbin is displaced to the upper common transfer position,
to the lower common transfer position, after the peg bar (18) for mounting full bobbins
is displaced to the upper common transfer position, the peg bar (18) for full bobbins
and the peg bar (19) for empty bobbins are held at temporarily reserving positions
to prevent possible interference between them while either one of these peg bars is
displaced.
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